Nut-wrench.



PATENTED APR. 18, 1905.

F. G. CORNELL.

NUT WRENCH.

APPLICATION FILED MAR. 28, 1904.

UNITED STATES Patented April 18, 1905.

PATENT OFFICE.

FRANK G. CORNELL, OF LOUISVILLE, KENTUCKY, ASSlGrNOR OF ONE- FOURTH TO AUGUSTUS E. lVlLLSON, OF LOUISVILLE, KENUUKY.

NUT-WRENCH.

SPECIFICATION forming part of Letters Patent No. 787,831, dated April 18, 1905.

Application filed March 28, 1904. Serial No. 200,304.

To 107/ 11:71.01 it many (Po/merit.-

lie it known that I, FRANK G. ConNuLL, of Louisville, county of Jefferson, and State of l\'entucky, have invented a new and useful In]- provement in Nut-\Vrenches, of which the following is a full, clear, and exact description.

.\ly invention relates to an improvement in nut-wremrhes; and it has for its object a nutwrench which is exceedingly simple, durable, and economical in its construction, the movable part of which may be easily and quickly moved to or from the work and rigidly held in place a sliding-jaw nut-wrench severely simple, having only two parts, absolutely complete, without a hole cast or drilled, without a thread or screw, and without a bolt, nut, or rivet to hold the wrench together, and the two parts of which are cast separately, cleaned, and then put together, finished complete without the aid of machinery or any machine-work, and is assembled without bending. springing, or cramping any part of the wrench, and when once in place will not come apart, as the action of the movable jaw will gradually close the opening through which the jaw was inserted.

This invention consists in the novel construction and combination of only two parts,

simple and easily and cheaply made and assembled, as will be hereinafter fully set forth, and pointed out in the claims.

Re ference is to be had to the accompanying drawings, comprising a part of this specilication, in which similar reference-lettersin dicate corresponding parts in all the iigures.

Figure 1 is a section on line I, Fig. 2, of a nut-wrench embodying my invention with the sliding jaw-bar removed. Fig. 2 is a section of the lixed or main jaw-bar on line ll, Fig. 1. Fig. 3 is a perspective view of the wrench, the main jaw-bar being partly broken away. Fig. a is a section on line IV, Fig. 3. Fig. 5 is a section on line V, Fig. 3.

in carrying out the description of this invention the jaw-bar u, as in Fig. 1, rigid jaw 0, guides 1/ u, openings 1/ and .2', and handle /L are as heretofore described by me in an application for a patent on a nut-wrench tiled March 28, 190%, Serial No. 200,303. \Vhat I wish to particularly describe in combination and add hereto is the stop (I, as in Figs. 1. 2, and 3, and the serrated arch c and teeth 12, as in Figs. 1, 2, and 3.

0 forms a serrated arch, as shown in Figs. 1, 2, 3, and 4:, connecting the web-like sides a u of the jaw-bar together, having teeth )2 on its under side to receive the teeth 1/! on the top edge of the movable jaw-bar B, as shown in Fig. 3.

1/ is a stop on the top edge of the guide 1/ at its end at the opening .2, having a projecting and preferably undercut end, against which the lug strikes, and by it the movable jawbar B is prevented from sliding to the handle /1 and dropping out at the openings 3/ and .2, as in Figs. 1 and 3. The end of stop (I is intended to be easily upset by the hammering of the lug j against the thin or serrated end,

causing a bur to form on stop (I, whereby the space between the top edge of the stop (I and the points of the teeth 11. on the under side of the arch c is gradually lessened. It will be seen that the serrated arch c, as in Figs. 2 and 5, does materially strengthen the rigid jawbar 1/.

The teeth 11 of the serrated arch c will be cast over a chill set in the core, and this chill will be thinner than the core, so that the shrinkage of the metal will not bind the chill, but allow it to be taken out at the jaw 0 end of the casting a.

F) is a movable jaw-bar, having a jaw a, as shown in Fig. 3, same as shown in speciiication in said previous application made by me for a patent on a nut-wrench, with the following exceptions: that the jaw-bar ll has no extended lugs or bosses on the sides of the trigger and that the lug has serrated teeth instead of segmei'ited teeth on its upper edge, and that the lug has two functions to perform in this wrench instead of one, as in said applicati0u-iirst, the lug j forms a shoulder which rests and slides on guides 11 u and keeps the serrated end of jawbar B from moving too far away from the serrated arch c, as

shown in Fig. 3; second, to provide a suitable stop to strike against the stop (I, as shown in Fig. 3. 1 and are openings through the guides at a, made for the purpose of inserting the movable jaw-bar B into the rigid jaw-bar a by inserting jj into the opening and the lugs If t into the openings y y. Then the movable jaw-bar B is moved toward the jaw 0 onto the guides at u and the lug 7' drops over and in front of the stop (Z, as in Fig. 3. The distance from the bottom of the lug j in Fig. 3 to top of teeth m on the top edge of lug j, as in Fig. 3, is just a fraction more than the distance from the top of stop (Z, Fig. 3, to the teeth a on the under side of the arch 0, as shown in Figs. 1 and 3. Thus it will be seen that some force will be necessary to push the jaw-bar B over the stop (Z, as shown in Fig. 3, and that when once in place it cannot be easily taken'out.

The wrench is intended to be operated ordinarily by one hand in grasping a nut, the thumb of the hand which holds the body of the wrench serving to actuate the movable jaw by the trigger l and move it against the nut. In this movement the teeth m and n are disengaged from each other. On applying pressure to turn the nut the movable jaw is thereby tilted sufliciently to cause said teeth to mutually engage and lock the jaw in position. On relieving such pressure the jaw B will tilt or can be moved reversely to disengage the teeth and release the nut.

If t are lugs formed on the movable jay -bar, having next to them spaces I, in which latter fit the guides at.

The combination and construction of the jaw-bar a, handle 7L, and trigger Z, all as described in said application by me, combine to make this wrench not only a convenient, but light, cheap, strong, and serviceable tool.

I do not in this application claim, broadly, the construction of the handle comprising the parallel side bars having the flanges a and openings or spaces y .2, or such a handle in combination with a laterally-insertible jawbar, the same being the subject in part of my said application Serial No. 200,303.

Having thus described my invention, I claim as new and desire to secure by Letters latent 1. In a wrench the combination of the fixed jaw, its -jawbar having a space within the same and inwardly-projecting teeth 02. at the back of the jaw-bar in said space, and the movable jaw-bar fitting and slidable in said space,

' having a jaw at its forward end, baekwardlyprojecting teeth m at its rear end, and an adjusting trigger extending down from the movable jaw-bar near the rear end of the latter in a direction transverse to the direction of sliding, substantially as set forth.

2. In a wrench the combination of the fixed jaw, its jaw-bar having a space within the same and inwardly projecting flanges or guides '24, with a slot between them and having inwardly-projecting teeth 12 in said space, and the movable jaw-bar fitting within said space, having means whereby it at its forward end engages said flanges to slide and tilt thereon and having backwardlyprojecting teeth m at its rear end, substantially as set forth.

3. in a wrench the combination of the fixed jaw-bar having parallel side bars a arranged with a space and a slot between them, the fixed jaw uniting the side bars at the forward end, the handle uniting the side bars at the rear end, the serrated arch 0 at the back of the rear part of the side bars, the movable jaw-bar mounted between the side bars with its jaw extending through said slot at a point between the handle and the fixed jaw and teeth m on the movable jaw-bar adapted to engage the serrations of said arch, substantially as set forth.

4. In a wrench the combination of the fixed jaw-bar havingan interior space and inwardlyprojecting guides u, in wardly-projecting teeth at in said space,.the sliding jaw-bar mounted in said space on said guides and longitudinally movable and tiltable on the same, and backwardly-projecting teeth on the sliding jaw-bar arranged for engagement with the teeth a, the guides being provided at the rear end with a stop adapted to be upset as described to retain the sliding jaw-bar, substantially as set forth.

5. In a wrench the combination of the fixed jaw, its jaw-bar having a space within the same and inwardlyprojecting teeth at the back of the jaw-bar in said space, and the movable jaw-bar fitting and slidable and tiltable in said space, having a jaw at its forward end and having at its rear end a bac'kwardly-extending lug 1' arranged to engage said teeth, and an adjusting-trigger extending without the fixed jaw-bar near the rear end of the same, substantially as set forth.

6. In a wrench, the combination of the fixed jaw-bar and the sliding jaw-bar, one of said parts being provided with a stop arranged to be upset by the operation of the sliding jawbar, to contract the space by which the sliding jaw-bar must be removed and thereby prevent the accidental separation of the parts of the wrench, substantially as set forth.

7. In a wrench the combination of a fixed jaw and bar and a movable jaw and bar both shaped for mutual engagement and sliding,

the movable jaw-bar being laterally insertible into a space within the fixed jaw-bar, and a stop adapted to be upset after the insertion of the movable jaw-bar, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in the presence of two witnesses, this 22d day of March, 1904.

FRANK G. CORNELL.

WVitnesses:

ARTHUR E. HOPKINS, N. K. ROBERTS. 

